GO PLACES! DO THINGS!

Along the ICE AGE FLOODS
NATIONAL GEOLOGIC TRAIL

The Ice Age Floods National Geologic Trail covers some 16,000 square miles (41,440 km2) in present day Montana, Idaho, Washington, and Oregon. We have hand picked some of the best of the best places along the Trail and present them here for you enjoy and explore! Check back often, we will be adding new and wonderful destinations for your entire Family to enjoy!

MONTANA – IDAHO – WASHINGTON – OREGON

Montana - Places to GO and Things to DO

Travelers’ Rest State Park

August 12, 2022

Travelers’ Rest State Park Ice Age Floods National Geologic Trail Located at an historic and contemporary crossroads, Travelers’ Rest State Park and National Historic Landmark is a place where visitors can say with certainty that they are walking in the footsteps of Lewis and Clark. The Park is at the core of a campsite used by the Corps of Discovery from September 9 – 11, 1805 and again from June 30 – July 3, 1806. In the summer of 2002, archaeologists uncovered evidence of the Corps of Discovery’s visit to the area, including a trench latrine tainted with mercury, fire hearths, and lead used in the repair and manufacture of firearms. The discovery makes Travelers’ Rest the only campsite on the Lewis and Clark Trail with physical evidence of the expedition. For centuries Native Americans also used the area as a campsite and trail junction. Salish, Pend d’Oreille and Nez Perce peoples were among those who traditionally occupied the area. Native American storytellers bring their history, culture and society to life as part of the programming at Travelers’ Rest State Park. The Bitterroot River is the primary body of water in this area, now running about 500 feet below the surface of what was once Glacial Lake Missoula, which extended all the way to the area now indicated by a high water marker at Lake Como. There are few vestiges of the Lake in this area but information and a display are located at the Visitor Center. Travelers’ Rest is an idyllic spot for strolling the park’s trails, and offers a rich bird habitat, with more than 115 species recorded within the park boundaries. Quick Facts Location:Located 1/2 mile west of Lolo on Hwy 12 Significance:Located at the crossroads of culture, this is the only archaeologicaly verified campsite of the Lewis and Clark Expedition, as well as the traditional homeland of the Selis Qlispe people. Designation:National Historic Landmark

Bison Range

February 5, 2023

Bison Range The Bison Range was established by President Theodore Roosevelt in 1908 to conserve the American Bison. Since that time it has been managed as a wildlife refuge and native grassland. Today the management is done by the Confederated Salish and Kootenai Tribes. The range is a small, low-rolling mountain connected to the Mission Mountain Range by a gradually descending spur. Range elevation varies from 2,585 feet (788 m) at headquarters to 4,885 feet (1,489 m) at High Point on Red Sleep Mountain, the highest point on the Range. Much of the Bison Range was once under prehistoric Glacial Lake Missoula. The upper part of the Range was above water. Red Sleep Mountain scenic drive leads to this high point, which has spectacular views across what was once the lake to the Mission Mountains on the other side. Other flood features are evident on Buffalo Prairie scenic drive. Old beach lines (strandlines) can be seen on north-facing slopes and some large erratics are located near the old corrals. There is a visitor center near the entrance which has a display and videos of Glacial Lake Missoula as well as information on the tribes of the Flathead Reservation and the abundant wildlife, including birds, bears and antelope. There is also a gift shop. Camas Prairie ripples and several other important features of Glacial Lake Missoula are in close proximity to this site, much of them are located on tribal lands. The entrance is off US 93 and MT 212 N about an hour north of Missoula. Bison Range58355 Bison Range Rd, Moiese, MT (406) 644-2661 bisonrange.org FEES – there is a fee for entrance, including the day use area, except for CSKT tribal members OPEN HOURSWinter Hours (Nov-April)Gate: 8am–6pmVisitors Center: 8am–5pm Red Sleep Drive: closed Buffalo Prairie Drive: 8am-6pm Summer Hours (May-Oct)Gate: 7am–8pmVisitors Center: 8am–7pm Red Sleep Drive: 8am–7pm Buffalo Prairie Drive:8am–8pm Restrictions: Vehicles over 30 feet long and those owing trailers as well as motorcycles, ATVs, and bicycles are not allowed on either drive. Visitors must remain inside vehicles at all times except for designated areas

Little Money Creek Gulch Fill

May 1, 2023

Mounds of soil, sand, gravel, and other coarse materials covered with light vegetation can be seen in the side gulches all along the Flathead River where tributaries drained into what was Glacial Lake Missoula. They were deposited by currents eddying into the slower water in these gulches and also by the drop in velocity of the streams carrying deposits from higher elevations on the far side of the river along the path of the escaping floodwaters. The flow of floodwaters through this narrow valley was estimated by J.T. Pardee at between 8 and 10 cubic miles per hours – more than the combined flow of all modern rivers in the world. Similar gulch fill can be seen in many locations along this beautiful stretch of the river, which today generally flows smoothly and looks completely flat. There are numerous pull-outs along MT 200 between Perma and Paradise; the view pictured here is at mile marker 91.

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Idaho - Places to GO and Things to DO

Celebration Park – Home of Melon Gravel

July 10, 2026

17,000 years ago, a massive Ice Age lake – now called Lake Bonneville – filled a large portion of present-day Utah. As temperatures changed, the influx of ice melt caused the lake level to rise. In addition, the Bear River, once a tributary of the Snake, was diverted by volcanic activity back into Lake Bonneville. These factors ultimately led to the breaching of a sedimentary rock dam at Red Rocks Pass, Idaho. There was only one ice-age Bonneville Flood because Lake Bonneville broke through a rock dam, unlike the Missoula Floods whose glacial ice dam repeatedly dammed Glacial Lake Missoula, then broke and rebuilt. 1,100 cubic miles of Lake Bonneville water rushed through the Snake River Canyon, and it took only six weeks for Lake Bonneville to empty the equivalent volume of modern-day Lake Michigan. The Great Salt Lake we know today is a remnant of Lake Bonneville, but at one tenth the size, it is a mere puddle compared to what the lake used to be. The power of this catastrophic flood widened canyons as the force of the water pulled huge chunks of basalt off the cliffs and tumbled them around, smoothing their jagged edges along the way. As the canyon width narrowed, the force and velocity of the flood increased. Wherever the canyons widened, the flood lost force and velocity, the waters slowed and began dropping its bedload – in this case, giant tumbled basalt boulders instead of your typical river gravel. These flood-rounded boulders, named melon gravel due to their distinct shape, are scattered over vast areas of land. The rocks’ unique outlines and smooth surfaces caught the eye of Native American tribes in the area, who have used them as canvases for petroglyphs for thousands of years. Visitors can see the medium sized flood deposits just outside the visitor center, or hike upriver to see gigantic melon gravel the size of heavy-duty trucks. Celebration Park is located in the Snake River Canyon, approximately 23 miles south of Nampa, Idaho. It is home to an enormous melon gravel field deposited by the Bonneville Flood.

Clark Fork Ice Dam

August 12, 2022

Ice Age Floods National Geologic Trail 12,000 to 17,000 years ago a 4000′ tall ice dam blocked the path of the Clark Fork River creating glacial Lake Missoula. At the end of the last ice age this ice dam failed, releasing more water than is held in modern day Lake Ontario and Lake Erie combined. 600 cubic miles of water rushed through this area and down Lake Pend Oreille destined for the Pacific Ocrean.One of the most intriguing questions about the catastrophic flooding is how the ice dam failed. Various mechanisms for glacial outburst floods have been proposed: Ice erosion by overflow water, subglacial failure by flotation, deformation of ice by water pressure, and erosion of subglacial tunnels by flowing water. One model suggests a self-dumping phenomenon. In this mechanism, floodwaters are released when the lake level reaches nine-tenths the height of the ice. At this depth the ice becomes buoyant, subglacial tunnels form and enlarge, and drainage occurs until hydrostatic pressure is decreased and the ice again seals the lake. The self-emptying model is used to explain the numerous cycles in the rhythmite deposits and to interpret each cycle as a separate flood. Even so, only the total collapse of the ice dam can explain the largest of the catastrophic foods. Sub-glacial tunneling and enlargement due to thermal erosion progressing to collapse have also been proposed, as well as catastrophic failure due to water pressure. All are dependent on the configuration of the ice dam and structure of the ice. Quick Facts Location:Clark Fork, Idaho

Green Monarch Ridge

August 12, 2022

Green Monarch Ridge Ice Age Floods National Geologic Trail THIS IS WHERE IT ALL BEGAN! The Green Monarch Ridge viewpoint, just south of the Hope Fault, is positioned along the edge of the Purcell Trench Ice Lobe. Here it was responsible for damming the mouth of the Clark Fork drainage basin. This damming effect resulted in the formation of Glacial Lake Missoula, the source of the waters for much of the PNW Pleistocene Ice Age Floods. The Purcell Trench Ice Lobe originated in Canada and flowed south into Idaho, guided by the structural control of the Purcell Trench. Following the path of least resistance into the basin now occupied by Lake Pend Oreille, it was impeded by the Green Monarch Ridge, located approximately 10 miles south of this viewpoint. Grinding and scraping, the Purcell Trench Ice Lobe backed up behind the Green Monarch Ridge, eventually building an ice plug up to 4,000 feet thick, and scouring out the deepest parts of Lake Pend Oreille. The Purcell Trench Ice Lobe divided into four sub-lobes: one went approximately west (US Highway 2), two went south (US Highway 95 and Lake Pend Oreille) and one went east (SR 200). All four sub-lobes contributed to blocking the Clark Fork drainageQuick Facts MANAGED BY:US Forest Service – Idaho Panhandle National Forest

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Washington - Places to GO and Things to DO

Fort Spokane Visitor Center

August 13, 2022

Fort Spokane Visitor Center Ice Age Floods National Geologic Trail “Fort Spokane is one of the cultural jewels of Lake Roosevelt National Recreation Area. For thousands of years, the area was a gathering place for native tribes fishing the rapids of the Spokane River. In

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Oregon - Places to GO and Things to DO

Columbia Gorge Discovery Center & Museum

July 7, 2022

Columbia Gorge Discovery Center & Museum Ice Age Floods National Geologic Trail, Lewis & Clark National Historic Trail, Oregon National Historic Trail The Columbia Gorge Discovery Center & Museum is located on a 54-acre point of land adjacent to the Columbia River and is the

Museum of Natural History, University of Oregon

April 23, 2024

Museum of Natural and Cultural History, University of Oregon The museum offers a variety of seasonal and year-round programs for science and culture enthusiasts of every age. Delve into Oregon’s story, from the archaeology of the First Americans to the dynamic cultures of today’s Tribes.

Hat Rock State Park

July 7, 2022

Hat Rock State Park Ice Age Floods National Geologic Trail, Lewis & Clark National Historic Trail Hat Rock is an erosion remnant warn way by floods from glaciers which melted over ten thousand years ago. Lewis and Clark saw this monument on their expedition and

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GO PLACES! DO THINGS!

Along the ICE AGE FLOODS
NATIONAL GEOLOGIC TRAIL

MONTANA – IDAHO – WASHINGTON – OREGON

Montana - Places to GO and Things to DO

Travelers’ Rest State Park

Bison Range

Little Money Creek Gulch Fill

Idaho - Places to GO and Things to DO

Clark Fork Ice Dam

Green Monarch Ridge

Washington - Places to GO and Things to DO

Fort Spokane Visitor Center

Oregon - Places to GO and Things to DO

Columbia Gorge Discovery Center & Museum

Museum of Natural History, University of Oregon

Hat Rock State Park

MONTANA – IDAHO – WASHINGTON – OREGON

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GO PLACES! DO THINGS!

Along the ICE AGE FLOODS NATIONAL GEOLOGIC TRAIL

MONTANA – IDAHO – WASHINGTON – OREGON

MONTANA – IDAHO – WASHINGTON – OREGON

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Along the ICE AGE FLOODS
NATIONAL GEOLOGIC TRAIL